package app

import "strings"

const (
	maxXLSXRowsPerSheet     = 1048575
	defaultXLSXRowsPerSheet = maxXLSXRowsPerSheet
)

type ExportFileOptions struct {
	Format                         string            `json:"format"`
	XLSXMaxRowsPerSheet            int               `json:"xlsxMaxRowsPerSheet,omitempty"`
	JobID                          string            `json:"jobId,omitempty"`
	TotalRowsHint                  int64             `json:"totalRowsHint,omitempty"`
	TotalRowsKnown                 bool              `json:"totalRowsKnown,omitempty"`
	InsertSQLDialect               string            `json:"insertSQLDialect,omitempty"`
	InsertSQLTargetTable           string            `json:"insertSQLTargetTable,omitempty"`
	InsertSQLColumnTypes           map[string]string `json:"insertSQLColumnTypes,omitempty"`
	InsertSQLTargetColumns         map[string]string `json:"insertSQLTargetColumns,omitempty"`
	InsertSQLAllowEmptyTargetTable bool              `json:"insertSQLAllowEmptyTargetTable,omitempty"`
}

func normalizeExportFileOptions(format string, options ExportFileOptions) ExportFileOptions {
	resolvedFormat := strings.ToLower(strings.TrimSpace(format))
	if explicitFormat := strings.ToLower(strings.TrimSpace(options.Format)); explicitFormat != "" {
		resolvedFormat = explicitFormat
	}
	return ExportFileOptions{
		Format:                         resolvedFormat,
		XLSXMaxRowsPerSheet:            normalizeXLSXRowsPerSheet(options.XLSXMaxRowsPerSheet),
		JobID:                          strings.TrimSpace(options.JobID),
		TotalRowsHint:                  normalizeExportTotalRowsHint(options.TotalRowsHint, options.TotalRowsKnown),
		TotalRowsKnown:                 options.TotalRowsKnown,
		InsertSQLDialect:               strings.ToLower(strings.TrimSpace(options.InsertSQLDialect)),
		InsertSQLTargetTable:           strings.TrimSpace(options.InsertSQLTargetTable),
		InsertSQLColumnTypes:           options.InsertSQLColumnTypes,
		InsertSQLTargetColumns:         options.InsertSQLTargetColumns,
		InsertSQLAllowEmptyTargetTable: options.InsertSQLAllowEmptyTargetTable,
	}
}

func normalizeXLSXRowsPerSheet(value int) int {
	if value <= 0 {
		return defaultXLSXRowsPerSheet
	}
	if value > maxXLSXRowsPerSheet {
		return maxXLSXRowsPerSheet
	}
	return value
}

func normalizeExportTotalRowsHint(value int64, known bool) int64 {
	if !known {
		return 0
	}
	if value < 0 {
		return 0
	}
	return value
}